[SR-Users] Location Table In db_mode 3

[Phil Lavin]

Setting it to 0 will give you significantly enhanced performance. It will only write data to disk every second.


From: sr-users [mailto:sr-users-bounces at lists.sip-router.org] On Behalf Of Gholamreza Sabery
Sent: 25 September 2016 09:16
To: Kamailio (SER) - Users Mailing List <sr-users at lists.sip-router.org>
Subject: Re: [SR-Users] Location Table In db_mode 3

Thank you very much for your responses. My innodb_buffer_pool_size = 16GB and data files are about 92 MB and

innodb_flush_log_at_trx_commit= 1

On Sun, Sep 25, 2016 at 12:07 AM, Sergey Okhapkin <sos at sokhapkin.dyndns.org<mailto:sos at sokhapkin.dyndns.org>> wrote:
I'd avoid slow innodb engine for "temporary" frequently changing tables like
location. Use MyISAM engine instead for the table.

On Saturday 24 September 2016 19:37:22 Phil Lavin wrote:
> Did you have a look at
> innodb_flush_log_at_trx_commit<http://dev.mysql.com/doc/refman/5.7/en/innod
> b-parameters.html#sysvar_innodb_flush_log_at_trx_commit>?

> Also, what value do you have for MySQL parameter innodb_buffer_pool_size and
> how large is your MySQL data directory at peak?

>
>
> From: sr-users [mailto:sr-users-bounces at lists.sip-router.org<mailto:sr-users-bounces at lists.sip-router.org>] On Behalf Of
> Gholamreza Sabery
 Sent: 24 September 2016 20:25
> To: Kamailio (SER) - Users Mailing List <sr-users at lists.sip-router.org<mailto:sr-users at lists.sip-router.org>>
> Subject: Re: [SR-Users] Location Table In db_mode 3
>
> Thank you so much for your response. Well if putting the table into memory
> is not a good option what is the best way to handle this situation?

> On Sat, Sep 24, 2016 at 10:50 PM, Phil Lavin
> <phil.lavin at cloudcall.com<mailto:phil.lavin at cloudcall.com><mailto:phil.lavin at cloudcall.com<mailto:phil.lavin at cloudcall.com>>> wrote:
 You
> could look at tweaking MySQL setting
> innodb_flush_log_at_trx_commit<http://dev.mysql.com/doc/refman/5.7/en/innod
> b-parameters.html#sysvar_innodb_flush_log_at_trx_commit> and setting its
> value to 0. It’ll make your database not ACID compliant, but I don’t see
> that as being a major issue for transient data such as that stored in the
> Kamailio DB.
> I’m not entirely convinced that changing it to a memory table will help as
> you are presumably doing MySQL replication between your two Kamailio nodes.
> Memory tables don’t replicate well.

>
> From: sr-users
> [mailto:sr-users-bounces at lists.sip-router.org<mailto:sr-users-bounces at lists.sip-router.org><mailto:sr-users-bounces at lists<mailto:sr-users-bounces at lists>
> .sip-router.org<http://sip-router.org>>] On Behalf Of Gholamreza Sabery
 Sent: 24 September 2016
> 20:04
> To: Kamailio (SER) - Users Mailing List
> <sr-users at lists.sip-router.org<mailto:sr-users at lists.sip-router.org><mailto:sr-users at lists.sip-router.org<mailto:sr-users at lists.sip-router.org>>>
> Subject: Re: [SR-Users] Location Table In db_mode 3
>
> On average I have about 2000 registrations per second and this configuration
> does not work with this rate. Maximum number of registrations that we can
> handle with db_mode 3 is 1000 per second.

> On Sat, Sep 24, 2016 at 10:12 PM, Phil Lavin
> <phil.lavin at cloudcall.com<mailto:phil.lavin at cloudcall.com><mailto:phil.lavin at cloudcall.com<mailto:phil.lavin at cloudcall.com>>> wrote:
 What
> rate of registrations do you have?
>
>
> From: sr-users
> [mailto:sr-users-bounces at lists.sip-router.org<mailto:sr-users-bounces at lists.sip-router.org><mailto:sr-users-bounces at lists<mailto:sr-users-bounces at lists>
> .sip-router.org<http://sip-router.org>>] On Behalf Of Gholamreza Sabery
 Sent: 24 September 2016
> 19:39
> To: Kamailio (SER) - Users Mailing List
> <sr-users at lists.sip-router.org<mailto:sr-users at lists.sip-router.org><mailto:sr-users at lists.sip-router.org<mailto:sr-users at lists.sip-router.org>>>
> Subject: [SR-Users] Location Table In db_mode 3
>
> I have multiple Kamailio servers in an Active/Active scenario (the database
> is a MySQL server) using db_mode 3. But when the number of clients goes up
> writes on the location table become too much and it causes database
> problems. I even put my location table on a separate SSD disk on the server
> to separate it's IO but still at times I have problems. How can I move
> location table into memory? Is this a good solution? What other options do
> I have?

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